Audiphone unit



Oct. 13, 1931 H. G. LEACH ET AL 1,826,797

gumrnous: UNIT I Filed Nov. 26. 1929 2 Sheets-Sheet 1 34 I INVENTORS f j HENRY 61LAcm"4mvEsr/i5r0 1.z

ATTORNEY Oct.,l3, 1931. H. G. LEACH ET Al.

AUDIPHONE UNIT Filed NOV. 26, 1929 v 2 Sheets-Sheet INVENTOR l /f/VRY 6? Z [A cm "'ER/VEMHS r01. 2

A ORNEY Patented Oct. 13, 1931 UNITED STATES PATENT OFFICE G, LEACH, F RED BANK, NEW JERSEY, AND ERNEST H. STOLZ, OF NEW ROCHELLE, NEW YORK AUDIPI-IONE UNIT Application filed November 26, 1929. Serial No 409,789.

The invention relates to an audiphone unit embodying a battery, a microphone and a receiver member; and it has for its object to provide for a ready and convenient interconnection and arrangement of the various members, more especially in the provision of a novel type of battery casing admitting of renewal of the cells and adapted for'supporting, if desired, a microphone element of the type adapted to be carried about ones person. The invention has for its object, also, to provide an association of audiphone ele ments which will admit conveniently of the use of interconnecting extension cables.

In carrying out the invention, a battery casing is provided of two hingedly connected members, one of which carries a double terminal connector element upon the exterior of the casing and to which may be directly connected and removahly the microphone member to be supported by the said battery casing; or the former may be connected to the battery by means of an extension cable having means cooperating with the terminal connector. The said microphone in either embodiment is removably connectible to a receiver member which admits also of the use of an extension cord, if desired.

The nature of the invention, however. will best be understood when descrlbed in connection wlth the accompanying drawings, in

I which Fig. 1 is a front elevation of a battery casing with the lid member open.

Fig. 2 is a vertical section taken on the line 22, Fig. 1 of the drawings. and looking in the direction of the arrows.

Fig 3 is an assembly view in elevation of the audiphone unit.

Fig. 4 is a similar view illustrating a modification.

Referring to the drawings, more particularly Figs. 1 and 2 thereof. abattery casing is indicated comprising a back member and a lid member 11 which are hingedly connected to each other, as shown, along corresponding side edges, and are adapted to beheld together by a suitable catch or snap lock 12 to enclose a plurality of electric cells 13.

The casing is preferably squared at the bot- The said cells are designed to be removablyretained in the back member 10 by means of a resilient frame embodying a longitudi-. nal strip 14 rigidly secured to and insulated from the casing back and having transverse resilient holding armsat its opposite ends, as the arms 15 and 16. Of these, the one arm 15 carries an insulated bridgingpiece 15 for connecting the two cells in series, and. the other arm 16 grounding, for example, to the casing the one terminal 17 of the battery. The other terminal 18 of said battery is designed to engage an insulated spring contact 19 carried by arm 16. A bushing 20 extends through the top' of the back member 10 in contact with the same and thus also with the. terminal 17 of the battery, while within the bushing and insulated therefrom is a further bushing or sleeve 21 and in circuit with the contact 19, thus affording a double terminal connector element accessible from the exterior of the casing.

This admits of directly plugging in a microphone memher 22 as through a plug 23 thereof and whereby the microphone may be carried directly on the casing and, if desired, on the person of a user; or, the casing may be set upon a suitable support or table 24. A receiver member 25 is also adapted to'be plugged to the microphone 22 or rather a socket 26 therefrom fitting a plug 27 of the said receiver cable which is of the required length and includes an adjustable resistance 28 whereby to control the volume of the sound emitted by length is to this" end provided between the battery casing 32 and the microphone 30, having the plug 34 for-insertion into the terminal socket 35 on the exterior of the casing and also a terminal socket 36 for connection with a connector element,-a microphone transmitt'er adapted for connection with the battery through the casing connector element, and a receiver member and connecting cable adapted for independent electrical connection with the microphone.

2. An audiphone, comprising a portable battery casing adapted to be opened and closed for renewal of the battery cells and having upon its exterior a double terminal connector element, amicrophone transmitter,

means to removably connect the same with the casing connector element, and a receiver member and connecting cable adapted-for independent electrical connection with the microphone.

3. An audiphone, comprising a portable battery casing adapted to be opened and closed for renewal of the battery cells and having upon its exterior a double terminal-socket, a microphone transmitter provided with a double terminal plug and a double terminalsocket, the'former being adapted for connection with the casing socket, and a receiver member and connecting cable adapted for independent electrical connection Wltl1 the socket of said microphone.

4. An audiphone, comprising a portable battery casing adapted to be opened and closed for renewal of the battery cells and having upon its exterior a double terminal connector element,'a microphone transmitter adapted for connection wit-h the battery through the casing connector element, a receiver member, aflexible cable adapted for independently electrically connecting the said receiver with the microphone, and an adjustable resistance included therein.

5. An audiphone, comprising a portable battery casing adapted to be opened and closed for renewal of the battery cells and having upon its exterior a double terminal electrical connection with the socket of the microphone.

'6. An *audiphone, comprising a portable battery casing adapted to be opened and closed for renewal of the battery cells and having upon its exterior a double terminal connector element, a microphone transmitter adapted for direct connection with the battery through the casing connector element and to be supported by the battery casing, and a receiver member and connecting cable adapted for independent electrical connectionwith the microphone.

In testimony whereof we aflix our signatures.

HENRY G. LEACH. ERNEST H. STOLZ.

socket, a microphone transmitter provided A with a double terminal plug and a double terminal socket, an intermediate extension cable with plug terminal at one end for connection to the battery socket and a socket terminal at its opposite end for connection to the microphone plug, and a receiver member and connecting cable adapted for independent 

